Wilwood's Classic Series front disc brake kits for Buick vehicles 1941 to 1956, offer disc brake upgrade solutions for OEM Drum spindles. A completely new kit design, featuring a large 11.88" x 1.29" rotor and hub assembly . Based on the venerable forged billet Dynalite caliper, these versatile kits are easily optioned to suit the braking requirements and style preferences for a daily driver or the most discriminating show enthusiast. Intended vehicle applications require no modifications for installation, and provide plenty of clearance inside popular 15" wheels. FDL 1 piece kits can be used with either manual or power boost master cylinders. Kits are complete with calipers, rotors and, hub assembly brackets and hardware. Requires purchase of additional brake line kit shown below.